olemus
automaatne reaalajas krüpteerimine andmete
salvestisse (kettale, mälupulgale) kirjutamisel ja
automaatne dekrüpteerimine sealt lugemisel
= a real-time cryptographic solution that automatically encrypts data when saved, and automatically decrypts data when accessed

ülevaateid
https://study.com/academy/lesson/what-is-on-the-fly-encryption.html

https://www.east-tec.com/kb/what-does-on-the-fly-encryption-mean/

https://en.wikipedia.org/wiki/Disk_encryption

näiteid
https://en.wikipedia.org/wiki/VeraCrypt

https://www.thefreecountry.com/security/encryption.shtml

https://www.ubuntupit.com/top-20-best-disk-and-file-encryption-software-for-linux/

https://arxiv.org/pdf/1512.06423.pdf